Sexual attraction to cousin embarrassing and strange

The Winnipeg Free Press has a Miss Lonelyhearts advice column about a woman attracted to her cousin and feeling embarrassed:

I'm in love with my first cousin and it's embarrassing to me. He loves me, too. He got over feeling creepy about it long ago, but I still feel like I shouldn't be marrying and having babies with my cousin. He doesn't worry, though. "Get over it, I'm not your brother," he says and laughs at me and then I kind of get over it. But the weird feeling creeps back.